Posted: September 17th, 2017

Why are there more species in the tropics than elsewhere?

You will write a short essay addressing one question from the following list:

• How many species are there on the earth?

• Why are there more species in the tropics than elsewhere?

• Are some species more worthy of conservation efforts than others?

• Why do we need biodiversity?

• What is the single biggest threat to biodiversity in the 21st century?

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